Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....shows how you can encrypt/password‑protect an Excel file using the...dataDir + "book1.xls" ); //Password‑protect the file. workbook . getSettings...